When knitting pullover sweaters for babies and kids, it's important to make sure the neck opening will fit over the head. Looking at sizing charts, 3 month heads are 15". Neck openings are 4.5". Yes, knitting stretches, but leaving one shoulder open is the answer for a sweater that will be worn.
Knitters have 2 choices:
![]()
| ![]()
|
NOTE: Don't forget about the sleeves!
Let's say you knit 1/2" bands at the left shoulder. Overlap the front over the back and you will be adding 1/2" to the armhole opening. Depending on the size sweater you are knitting and the gauge of your yarn, you may be able to just work this into the sleeve cap seam.
If not, you may want to adjust the sleeve cap slightly or knit fewer rows on the garment pieces at the left shoulder.